SEMILEPTONIC DECAYS ON THE LATTICE - THE EXCLUSIVE O- TO O- CASE

被引：57

作者：

BERNARD, CW

ELKHADRA, AX

SONI, A

机构：

[1] FERMI NATL ACCELERATOR LAB,THEORY GRP,BATAVIA,IL 60510

[2] BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973

[3] UNIV CALIF SANTA BARBARA,INST THEORET PHYS,SANTA BARBARA,CA 93106

来源：

PHYSICAL REVIEW D | 1991年 / 43卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.43.2140

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present our results for the meson form factors of several semileptonic decays. They are computed from the corresponding matrix elements evaluated on the lattice as ratios of Green's functions. The renormalization of the local operators is calculated nonperturbatively. The dependence of the form factors on the four-momentum transfer q2 is studied by injecting external three-momenta to the initial- and final-state mesons. We study the pseudoscalar decays K --> pi-lv, D --> Klv, D --> pi-lv, D(s) --> eta-lv, and D(s) --> Klv on different lattices. We also analyze scaling, finite-size, and SU(3)-symmetry-breaking effects. The uncertainties in some lattice parameters, e.g., a-1, as a source of systematic errors in this calculation are discussed.

引用

页码：2140 / 2156

页数：17

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